Demodulation apparatus for phasemodulated telegraphic code



Nov. 14, 1967 Filed June 3, 1963 21 Sh86LS-Sheet 1 FIG. I

I 2 3 4 5 e 7' IAIWH m (S l I I I I I I I I I I IOIICITEIOI'IIITEIOI (C I I I I I l I FIG. 2

(-7 I- *fi *"I Mb) I TIMING PULSE "I I 4 GENERATOR 5 6 I I I i I RING DIFFEREN- BISTABLE I MODULATOR 'NTEGRATOR TIATOR CIRCUIT I J I sf ;I5 I ,(I? I6 I I I RING BISTABLE I ILIIODULATORTCIRCUIT RECT'F'ER l I J I FREQUENCY '4 I MULTIPLIER I I I 9 I PHASE I I SHIFTER I I RING I o 0 I3 MDULAT R I I l Io FREQUENCY I I INTEGRAL MULTIPLIER IAI I CIRCUIT I I I I l osII I AToR' I I REACTANCE I I CONTROL J I CIRCUIT I KAZUO KAWAl ETAL.

DEMODULATION APPARATUS FOR PHASE-MODULATED TELEGRAPHIC CODE 14, 1967 KAZUO KAWAI ETAL 3,353,101

DEMODULATION APPARATUS FOR PHASE-MODULATED TELEGRAPHIC CODE Filed June 5, 1963 21 Sh ets-Sheet 2 O O DEMODULATION a m CIRCUIT REGULATION PHASEMEMORY CIRCUIT CIRCUIT [v AUTOMATIC CONTROL CIRCUIT 11 FIG. 3(8) c DEMODULATION REGULATION CIRCUIT CIRCUIT T e AUTOMATI PHASE CONTROL ClR UlT MEMORY CIRCUIT '9 FIG. 3(0) PHASE MEMORY CIRCUIT r I c REGULATION DEMODULATION CIRCUIT CIRCUIT 9 AUTOMATIC A CONTROL n CIRCUIT Nov. 14, 1967 KAZUO KAWAI ETAL 3,353,101

DEMODULATION APPARATUS FOR PHASE-MODULATED TELEGRAPHIC CODE 21, Sheets-Sheet 1 7 FIG. 6(5) Filed June 5, 1963 14, 1967 KAZUO KAWAI ETAL 3,353,101

DBMODULATION APPARATUS FOR PHASEMODULATED TELEGRAPHIC CODE Filed June 3, 1963 21 Sheets-Sheet, 5

FIG. 8(A) F|G.8(B)

| 2 3 4 5 e 7 I 2 s 4 5 e 7 o o W "0, o '6- TE TC TC TC TE 7E v 7E TE (2) O O O 2 O '0 TE TE TE TE TE TE 7E 7E TE \l\] \J W \I\] \I (5) L L L L 5 L L L L l I T r- T r (e) L L L L (e) L L L L L (8) *(s) E P 14, 1967 KAZUO KAWAl ETAL 3,353,101

DEMODULATION APPARATUS FOR PHASE-MODULATED TELEGRAPHIC CODE Filed June 3, 1963 21 Sheets-Sh et J FIG. I?)

| I l I (O) :MoMb:SaSb :MuSb }SuMb:Sc|Sb :Mu Mb:SaSb {Mn MbESoSb :MoSmSuMb:

| l I I I I I I n n n n u u v u u u 0 H f1 1 H H H (3) U U U U (Q)X(B) n n n n V v v u u v (e) n n n H A (mm) N 1967 KAZUO KAWAI ETAL 3,353,101

DEMQDULATION APPARATUS FOR PHASEMODULATED TELEGRAPHIC CODE 21 Sheets-Sheet 1o Filed June 5, 1963 FIG. I4

AND

AND

AND

OR GATE cmcun' I I FMODULATOR I I3z7 RING III I r-+- CIRCUIT OR GATE AND AND I AND AND GATE GATE GATE GATE CIRCUIT CIRCUIT CIRCUIT CIRCUIT AND GATE GATE GATE GATE [RECT- RECT- FIER IFIER 140 OR GATE CIRCUIT CIRCUIT CIRCUIT CIRCUIT CIRCUIT OR GATE CIRCUIT I I I I l L RING MODULATOR I GATE UIT

TIA- TOR I mT- DIFF- ATOR RING MOD- 'TULA- I. I I I I BISTABLE ORGATE CIRCUIT CIRCUIT OSCIL- LATOR REACTANCE CONTROL CIRCUIT I I I I Nov-14.1961 KAZUO KAWA] Em 3,353,101

DEMODULATION APPARATUS FOR PHASE-MODULATED TELEGRAPHIC CODE Filed June 5, 1963 21 Sheets-Sheet 12 FIG. I5( CI Ach Bch Ach Bch A Bch Ach Bch I I I I I I I i I I I I 2) I I I I I I 1 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I M M M s s s s M Ach Bch Ach Bch Ach Bch Ach Bch I I I I I I I I I l I I I I I I I I I I I I I (3) I I I I I I I I I i I I I I I I I I 5 M M M S S S S M Nov. 14, 1967 KAZUO KAWAI ETAL. 3,353,101

DEMODULATION APPARATUS FOR PHASE-MODULATED TELEGRAPHIC CODE 21 Sheets-Sheet 18 Filed June 3, 1963 PI G. 23m) IIHHH HUN H IHnHH .H N IHH I I UH 96 KAzuo KAWAI ETA? Filed June 5, 1963 21 Sheets-Sheet 19 FIG. 23(8) UH I IHH 14, 1967 KAZUO KAWAl ETAL 3,353,101

DEMODULATION APPARATUS FOR PHASE-MODULATED TELEGRAPHIC'CODE 21 Sheets-Shet 20 Filed June 5, 1963 FIG. 23(6) ||n|| I I 1.

FIG. 23(D 

1. A DEMODULATION APPARATUS FOR A PHASE-MODULATED TELEGRAPHIC SIGNAL HAVING MULTIPLE PHASE POSITIONS EACH OF WHICH IS DETERMINED IN ACCORDANCE WITH POLARITY OF A TELEGRAPHIC CODE TO BE TRANSMITTED AND USING A PHASE POSITION OF AN IMMEDIATELY PRECEDING UNIT CODE ELEMENT OF REFERENCE, WHICH COMPRISES, A DEMODULATION CIRCUIT GENERATING A DEMODULATED SIGNAL CORRESPONDING TO SAID TELEGRAPHIC SIGNAL COMPRISING FIRST TERMINAL MEANS FOR RECEIVING SAID PHASE-MODULATED SIGNAL, SECOND TERMINAL MEANS FOR RECEIVING A REFERENCE CARRIER WAVE, A PHASE DETECTOR FOR DETECTING A MAGNITUDE AND SIGN OF A DIFFERENCE BETWEEN PHASE POSITIONS OF SAID TELEGRAPHIC SIGNAL APPLIED THERETO FROM SAID FIRST TERMINAL MEANS AND SAID REFERENCE CARRIER WAVE APPLIED THERETO FROM SAID SECOND TERMINAL MEANS AND OF THE SAME FREQUENCY AS SAID TELEGRAPHIC SIGNAL, SAID PHASE DETECTOR COMPRISING A RING MODULATOR HAVING AN OUTPUT COMPRISING A DIRECT CURRENT VOLTAGE, AN INTEGRATOR CONNECTED TO SAID PHASE DETECTOR FOR INTEGRATING THE DIRECTCURRENT VOLTAGE OF THE OUTPUT OF THE RING MODULATOR AT EVERY UNIT CODE ELEMENT OF SAID TELEGRAPHIC SIGNAL AND PRODUCING AN INTEGRATED SIGNAL SUCCESSIVELY HAVING A PLUS OR MINUS POLARITY ACCORDING TO THE SIGN OF SAID DIFFERENCE, PULSE MEANS RECEPTIVE OF SAID INTEGRATED SIGNAL FOR TRANSFORMING THE INTEGRATED SIGNAL INTO A PULSE SIGNAL OF PLUS 